Farmers do not love them all. Microbes can cause tragic consequences for crops. Even the presence of just one pathogenic fungus or bacterium can drastically reduce yields. Still, there are exceptions. In that case, a pathogenic microbe is present in the soil, but does not cause any harm. Adam Ossowicki…

The new MASCARA-facilty in Chile has achieved first light. This new facility will seek out transiting exoplanets as they pass in front of their bright parent stars and create a catalogue of targets for future exoplanet characterisation observations.

Potential drugs that seem promising in the lab, but don’t show any activity in a person: they cost the industry an incredible amount of time and money. That’s why Indira Nederpelt focuses on a more efficient search for new drugs in her PhD, by determining the kinetics of a potential drug earlier on…

Soil ecologist Emilia Hannula has been awarded a Vidi grant by NWO to examine how soil could become a promising ally in combating climate change and improving biodiversity. ‘Soil creatures might be invisible’, she says, ‘but they play a huge role in creating a healthy environment.’

The European Commission has officially established Euro-BioImaging – which provides life scientists with open access to a broad range of technologies and resources in biological and biomedical imaging – as a European Research Infrastructure Consortium (ERIC). The Cell Observatory in Leiden is part of…

At the start of the COVID-19 pandemic, researchers from 15 departments at Leiden University Medical Center (LUMC) realised they could do more for patients if they joined forces. This is how the BEAT-COVID group has been able to rapidly gain knowledge about COVID-19, the role of the immune system and…

The ancient Roman province of Lusitania, more or less contemporary Portugal, has been the focus of a joint research project by Leiden University, Évora University and the Royal Netherlands Institute in Rome. The research project has now been provided with a new boost by a large Regato grant managed…

Cláudio de Sá predicted the preferences of people using rankings. He adjusted ‘classical’ machine learning approaches, making them suitable for predicting preferences. His work can be applied in the prediction of election results. PhD defence on 16 December.

Astronomers led by Leiden astronomer Sebastiaan Haffert have directly imaged two planets that are gravitationally carving out a wide gap within a planet-forming disk surrounding a young star. While over a dozen exoplanets have been directly imaged, this is only the second multi-planet system to be p…

Over the years, many spectacular archaeological finds have been washed ashore on the Dutch coast. Among these a large assemblage of barbed points made of bone and antler from the Mesolithic (11,000-8000 BC). The species used by Mesolithic hunter-gatherers to manufacture their barbed points remained…

SAILS Professor Gerard van Westen tells us about his first 100 days 'in the office'.

In June and July 2012 a Leiden Fieldschool was conducted at the late pre-Columbian site of Anse Trabaud in southeastern Martinique. High levels of preservation and waterlogged contexts revealed spectacular finds.

Former dean and physicist Frans Saris writes in his new book ‘Darwin’s combination lock’ how our culture enabled us to dominate nature and about the corresponding responsibilities. Together with Joris Berkhout he will talk about his book during the This Week’s Discoveries on 27 February.

Leiden chemical biologists led by Dr Mario van der Stelt have developed a method to facilitate the search for new drugs. This method has allowed them to take an important first step in the development of a drug against obesity.

Research on papyri has provided new insights into the history of the origins of Islam. Petra Sijpesteijns’s book,'Shaping a Muslim State', is based on these ancient Arabic letters and documents. Her new research on a Viennese collection of untranslated papyri is expected to produce more discoveries.

An international partnership of brain researchers from 35 research centres - from the US to China - including the Leiden Institute for Brain and Cognition (LIBC), has collected resting-state functional MRI data from more than 1400 healthy volunteers and put the information online so that it is available…

Tiny self-propelling spheres, measuring only micrometers, move faster over a hydrophobic silicone surface than they do over hydrophilic glass. 'Almost nobody had realised that the substrate matters', says Stefania Ketzetzi, the researcher who discovered the effect, researched it and explained it. She…

Koen Bastiaans and his colleagues discovered a new quantum liquid unlike anything ever seen. They did it by using a technique that can be compared to listening to the sound of raindrops falling on a roof. Publication in Science 29 October.

Marc Koper, Professor of Catalysis and Surface Chemistry, has been elected as President Elect of the International Society of Electrochemistry (ISE). He will be President Elect for two years starting January 2019, followed by two years as President and two years as Immediate Past President.

Physicist Martin van Exter works with light at nanoscale, at the forefront of nanocomputer research. But as Director of Education he also has a vision for physics teaching. Inaugural lecture 18 November.

The way that traditional hunter-gatherers roasted tubers can shed new light on how people prepared food in prehistoric times. Archaeologist Stephanie Schnorr has studied the food preparation culture of the Hadza in Tanzania.

Researchers from the Leiden Institute of Chemistry show proof of principle that live-cell structural changes and metabolic processes can be followed in real time with NMR spectroscopy. They performed their study on photosynthetic green algae that are metabolically flexible and can sustain energy generation…

On Friday October 30th 2015 the sixth annual Jan Reedijk Symposium will be held. The main lectures of the day will be

The brains of adolescents react more responsively to receiving rewards. This can lead to risky behaviour, but, according to Leiden University research, it also has a positive function: it makes learning easier. Publication in Nature Communications.

Just like us, plants also produce growth hormones, and they also go through an ageing process. The study of the genes and mechanisms behind these processes is useful not only for crop breeding and agriculture, but also for medical research. That is the view held by Professor of Plant Developmental Genetics…

Martin van Hecke en Anne Meeussen publiceren in het tijdschrift Nature over mechanische metamaterialen. Ze hebben een nieuwe klasse multistabiele materialen ontdekt. Dit is gebaseerd op ribbeltjes plastic.

Neanderthals used careful techniques to hunt their prey at close range. This is the conclusion of an international team of archaeologists, including researchers, in the journal Nature Ecology and Evolution. Publication 25 June.

To date it has proved very difficult to convert the promises of the miracle material graphene into practical applications. Amedeo Bellunato, PhD candidate at the Leiden Institute of Chemistry, has developed a method of cutting graphene into smaller fragments using a diamond knife. He can then construct…

The more complex the object, the harder it is to fold up. Space satellites often need many small motors to fold up an instrument, and people have difficulty simply folding up a roadmap. Physicists from Leiden and Amsterdam have now designed a structure that folds itself up in several steps. Publication…

Astronomers from Leiden University have discovered that the star wind from a newborn star in the Orion Nebula prevents more stars from forming in the immediate vicinity. They made the discovery with data from the SOFIA observatory. This was announced by co-author Xander Tielens during a press conference…

We do it every day but barely give it a thought: chewing our food. But the ‘simple’ process of masticating food may have played a crucial role in the evolution of our jaws, facial muscles and teeth.

At the International Online Conference 'Fair Medicine and Artificial Intelligence' organised by the University of Tübingen (Germany), Hadassah Drukarch, junior researcher at eLaw, gave a presentation on how current algorithmic-based systems may reinforce biases in healthcare. This topic forms part of…

What do you do with a museum collection full of individual white Nobel laureates at a time when diversity, inclusion and teamwork reign supreme? Ad Maas, professor by special appointment, and researcher Hilbrand Wouters have been awarded an NWO Museum grant to answer that question.

An international group of scientists, led by Leiden physicist Sense Jan van der Molen, has developed the first switchable molecular diode. You can turn this on and off through humidity. Vice versa, it is a humidity sensor at the nanoscale. Publication on 4 December in Nature Nanotechnology.

Should the background of the painting remain blue or be restored to its original gold colour? PhD candidate Liselore Tissen will be using 3D prints and eye-tracking software to answer this question. NICAS is giving her a grant of 18,000 euros to accomplish this.

Life returned to something resembling normal after Covid but other crises soon took its place. These great challenges are also being felt at the University and our researchers are working on solutions. The nitrogen crisis, problems with young people’s services and an increasingly urgent climate crisis:…

The enormous adaptability of the cholera bacterium explains why it is able to claim so many victims. Professor Ariane Briegel from the Leiden Institute of Biology has now discovered that this adaptability is due to rapid sensory changes in the bacterium. Publication in PNAS.

Besides being the author of such a classic work of literature as The Hobbit, Tolkien was also Professor of English Language and Literature in Oxford. How did he incorporate his research in his fiction? An international conference on the subject is being held in Leiden on 18 June.

With the help of software that mimics a human brain, ESA’s Gaia satellite spotted six stars zipping at high speed from the centre of our Galaxy to its outskirts. This could provide key information about some of the most obscure regions of the Milky Way.

Astronomers led by Pieter van Dokkum have discovered a galaxy that barely contains any dark matter, which actually proves that dark matter does indeed exist. The research results will be published this week in Nature.

Evidence that the right diet can prevent or alleviate depression is weak. In literature reviews on the subject, the authors often reach strong conclusions, nonetheless. This is what Florian Thomas-Odenthal, a master’s student in Psychology at Leiden University, discovered in his thesis research. Publication…

Astronomers at Leiden University have discovered the first planets using a new instrument: the planet hunter MASCARA. This instrument, developed at Leiden Observatory, looks specifically for planet transitions around the brightest stars in the sky, which surprisingly enough have so far have hardly been…

Leiden archaeologists have identified a number of bone fragments that were excavated in Germany two years ago. The fragments are from a sabre-toothed cat and appear to be parts of the skull of a prehistoric feline that is over 300,000 years old.

How can a single origami crease pattern be folded into two precisely defined target shapes? Researchers at AMOLF and Leiden University have created an ‘alphabet’ of 140 origami ‘puzzle pieces’ that allows them to do just that, as described today in Nature Physics. This discovery could help in the construction…

About one and a half million people worldwide die each year from tuberculosis. For thirty years, therapy with antibiotics has been the same, while it takes far too long and can lead to resistant pathogens. Leiden researchers from four institutes are now joining forces to develop more effective and efficient…

For a long time, even many researchers thought that guide dogs were a relatively modern invention. An accidental encounter with archival material showed university lecturer Krista Milne that guide dogs helped their blind owners as far back as the Middle Ages. Milne now has received an NWO XS grant to…

Sixth-grade students with lower mathematical ability perform better on complex arithmetic problems if they write down their calculations. This discovery was made by psychologist Marije Fagginger Auer, a specialist in Methodology and Statistics. Her outlook is optimistic: ‘After training, these students…

Just as some people today dislike English influences on the Dutch language, in early modern times people also criticised the Frenchification of Dutch. But to what extent did French actually leave its mark in our language? PhD student Brenda Assendelft made a surprising discovery. PhD defence 24 May.

Leiden University is participating in a project to reassemble Roman vessels from between 80 - 200 AD. The 'Zwammerdam ships' are already world famous in the world of archaeology, and guest researcher Tom Hazenberg hopes to extend this fame beyond its academic boundaries.

Psychologist Hilmar Zech found that overweight people are actually more attracted to food pictures after eating than before. He did so using an old research method that he revamped for use on smartphones. Zech will defend his PhD on 30 April.